syzkaller login: [ 38.907798] BUG: Bad rss-counter state mm:0000000045cb7d6a type:MM_FILEPAGES val:33 [ 38.908838] BUG: Bad rss-counter state mm:0000000045cb7d6a type:MM_ANONPAGES val:22 [ 39.076943] ================================================================== [ 39.077957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.078956] Read of size 8 at addr ffff8880098a3798 by task sshd/218 [ 39.079956] [ 39.080191] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.081137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.082190] Call Trace: [ 39.082531] [ 39.082836] dump_stack_lvl+0x91/0xf0 [ 39.083352] print_report+0xcc/0x620 [ 39.083883] ? __virt_addr_valid+0x102/0x340 [ 39.084469] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.085131] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.085788] kasan_report+0xbe/0xf0 [ 39.086295] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.086971] vma_interval_tree_remove+0xc75/0xec0 [ 39.087612] vma_prepare+0xc54/0x11a0 [ 39.088121] __split_vma+0x5af/0x950 [ 39.088636] ? __pfx___split_vma+0x10/0x10 [ 39.089202] ? find_held_lock+0x2c/0x110 [ 39.089750] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.090349] ? lock_is_held_type+0x9f/0x120 [ 39.090919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.091560] ? mtree_range_walk+0x632/0x900 [ 39.092144] ? mas_walk+0x5c7/0x7c0 [ 39.092666] do_vmi_munmap+0x1f1/0x2b0 [ 39.093194] mmap_region+0x1f9/0x2660 [ 39.093705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.094254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.095005] ? __pfx_lock_acquire+0x10/0x10 [ 39.095578] ? __pfx_mmap_region+0x10/0x10 [ 39.096144] ? security_mmap_addr+0x7d/0xa0 [ 39.096729] ? get_unmapped_area+0x1f5/0x3f0 [ 39.097309] do_mmap+0x854/0xf00 [ 39.097774] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.098299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.098895] ksys_mmap_pgoff+0x3af/0x500 [ 39.099440] do_syscall_64+0x3f/0x90 [ 39.099948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.100651] RIP: 0033:0x7fab7272dd82 [ 39.101144] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 39.103464] RSP: 002b:00007fff6d217ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.104472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab7272dd82 [ 39.105417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab71b67000 [ 39.106356] RBP: 00007fab71b67000 R08: 0000000000000009 R09: 0000000000001000 [ 39.107296] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baa5d06d90 [ 39.108231] R13: 00007fff6d217ec0 R14: 00007fff6d217ef0 R15: 00007fff6d218250 [ 39.109191] [ 39.109513] [ 39.109750] Allocated by task 211: [ 39.110229] kasan_save_stack+0x22/0x50 [ 39.110785] kasan_set_track+0x25/0x30 [ 39.111333] __kasan_slab_alloc+0x59/0x70 [ 39.111909] kmem_cache_alloc+0x16b/0x370 [ 39.112480] vm_area_dup+0x20/0x160 [ 39.113004] __split_vma+0x170/0x950 [ 39.113516] split_vma+0xc6/0x110 [ 39.114000] mprotect_fixup+0x8d2/0xb30 [ 39.114554] do_mprotect_pkey+0x87e/0xd40 [ 39.115129] __x64_sys_mprotect+0x78/0xc0 [ 39.115703] do_syscall_64+0x3f/0x90 [ 39.116224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.116939] [ 39.117176] Freed by task 211: [ 39.117609] kasan_save_stack+0x22/0x50 [ 39.118163] kasan_set_track+0x25/0x30 [ 39.118708] kasan_save_free_info+0x2b/0x50 [ 39.119296] __kasan_slab_free+0x10a/0x190 [ 39.119884] kmem_cache_free+0x10d/0x4d0 [ 39.120518] rcu_core+0x8c8/0x2860 [ 39.121038] __do_softirq+0x1b7/0x7d4 [ 39.121567] [ 39.121804] Last potentially related work creation: [ 39.122451] kasan_save_stack+0x22/0x50 [ 39.123006] __kasan_record_aux_stack+0x8e/0xa0 [ 39.123640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.124351] remove_vma+0x139/0x170 [ 39.124863] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.125480] do_vmi_munmap+0x1f1/0x2b0 [ 39.126017] __vm_munmap+0x138/0x3a0 [ 39.126530] __x64_sys_munmap+0x59/0x80 [ 39.127076] do_syscall_64+0x3f/0x90 [ 39.127596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.128306] [ 39.128554] Second to last potentially related work creation: [ 39.129579] kasan_save_stack+0x22/0x50 [ 39.130263] __kasan_record_aux_stack+0x8e/0xa0 [ 39.131018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.131867] remove_vma+0x139/0x170 [ 39.132455] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.133245] do_vmi_munmap+0x1f1/0x2b0 [ 39.133894] mmap_region+0x1f9/0x2660 [ 39.134517] do_mmap+0x854/0xf00 [ 39.135097] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.135726] ksys_mmap_pgoff+0x3af/0x500 [ 39.136398] do_syscall_64+0x3f/0x90 [ 39.137056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.137912] [ 39.138197] The buggy address belongs to the object at ffff8880098a3740 [ 39.138197] which belongs to the cache vm_area_struct of size 168 [ 39.140161] The buggy address is located 88 bytes inside of [ 39.140161] freed 168-byte region [ffff8880098a3740, ffff8880098a37e8) [ 39.142056] [ 39.142337] The buggy address belongs to the physical page: [ 39.143219] page:00000000bc4785d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98a3 [ 39.144673] memcg:ffff88800c719101 [ 39.145260] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.145968] page_type: 0xffffffff() [ 39.146462] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.147437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c719101 [ 39.148393] page dumped because: kasan: bad access detected [ 39.149120] [ 39.149344] Memory state around the buggy address: [ 39.149966] ffff8880098a3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.150865] ffff8880098a3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.151757] >ffff8880098a3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.152661] ^ [ 39.153206] ffff8880098a3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.154117] ffff8880098a3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.155020] ================================================================== [ 39.156151] Disabling lock debugging due to kernel taint [ 41.714042] BUG: Bad rss-counter state mm:000000005a7bee48 type:MM_FILEPAGES val:33 [ 41.715296] BUG: Bad rss-counter state mm:000000005a7bee48 type:MM_ANONPAGES val:22 [ 42.213519] BUG: Bad rss-counter state mm:00000000a81939c0 type:MM_FILEPAGES val:33 [ 42.214508] BUG: Bad rss-counter state mm:00000000a81939c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14956' (ECDSA) to the list of known hosts. 2023/06/19 19:27:01 fuzzer started 2023/06/19 19:27:01 dialing manager at localhost:44161 2023/06/19 19:27:01 checking machine... 2023/06/19 19:27:01 checking revisions... [ 42.921410] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:27:01 testing simple program... [ 42.959562] cgroup: Unknown subsys name 'net' [ 43.074211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:27:01 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=0000000000000013 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000014 RDI=ffff88800e8af2a8 RBP=dffffc0000000000 RSP=ffff88800e8af180 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000014 R13=0000000000092cc0 R14=ffff88800e8af210 R15=0000000000092cc0 RIP=ffffffff813ad601 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8e4d0d9900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8e4d690618 CR3=000000000d516000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f3185f297a0 CR3=000000000d67c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=3e0c357542d932978c42c7e598a843fa XMM02=2c67c8bc2e329bc3000000000011d0b0 XMM03=fb795ef6d65770560000000000123920 XMM04=5fb4bd13bee333fb00000000000ae988 XMM05=0de8716619801c670000000000135cf8 XMM06=806171799158d9670000000000134d98 XMM07=e042d86d42eb936e0000000000123bf8 XMM08=227aa17a6f0cc31e000000000011d110 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000